mowing the lawn

This morning I woke up, so kindly, to FI mowing the lawn..... at 830 am. I was pissed. Not only because I never sleep in and he was mowing the lawn while I was sleeping in, but also becuse of the neighboors. I think 830 am is too early to mow the lawn. He argues it's not.

What do you think? What is the OK starting time to mow the lawn on a weekend?